The angle bisectors of the three angles of XYZ, intersect at the incenter of the circle. With that incenter a circle can be drawn to touch the three sides internally. 6.
To comply with Navigation Rules and for distress signaling purposes all boats must carry a sound producing device (whistle, horn, siren, etc.) capable of a 4-second blast audible for Â½ mile. *Boats larger than 39.4 ft. are no longer required to have a bell (see Navigation Rules.)
Speakers and headphones are output devices that can play sound. You can control the output by turning the volume up or down. A webcam usually has a microphone built-in and both are input devices. More recent digital devices, like smartphopnes, tablets and laptops have cameras and microphones built-in.